Abstract
In order to learn the combining ability of LongS newly registered dual-purpose genic male sterile rice,12 combinations from crossing of LongS,Y58S and Guangzhan63S with 4 elite restorer lines were tested and then three results were got.The first one is that grain weight per plant(GWP)of the hybrids of LongS had a significant increase over the check because of greater advantages in spikelets per panicle(SP),over the hybrids of Y58S mainly because of increasing in 1 000-grain weight(TGW),over the hybrids of Guangzhan63S mainly because of increasing in panicles per plant(PP).The second is that he general combining ability(GCA) of LongS was better than that of Y58S and Guangzhan63S in GWP,PP,SP and biomass.And the third one is that the hybrids of LongS had greater variance of special combining ability(SCA) in PP,SP,TGW,seed setting percentage,grain pumped degree and biomass.
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